[PATCH bpf-next v6 0/2] bpf: enable some functions in cgroup programs

Matteo Croce
2024-08-19T16:28:12Z

Enable some BPF kfuncs and the helper bpf_current_task_under_cgroup()
for program types BPF_CGROUP_*.
These will be used by systemd-networkd:
https://github.com/systemd/systemd/pull/32212

v5->v6:
Called register_btf_kfunc_id_set() only once
Fixed build error with !CONFIG_CGROUPS

v4->v5:
Same code, but v4 had an old cover letter

v3->v4:
Reset all the acked-by tags because the code changed a bit.

Signed-off-by: Matteo Croce <teknoraver@meta.com>

Matteo Croce (2):
bpf: enable generic kfuncs for BPF_CGROUP_* programs
bpf: allow bpf_current_task_under_cgroup() with BPF_CGROUP_*

include/linux/bpf.h | 1 +
kernel/bpf/btf.c | 8 ++++++--
kernel/bpf/cgroup.c | 2 ++
kernel/bpf/helpers.c | 24 ++++++++++++++++++++++++
kernel/trace/bpf_trace.c | 27 ++-------------------------
5 files changed, 35 insertions(+), 27 deletions(-)

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2.46.0